C/S:   Northern Parula     Parula americana       Av. Size:   4.5 in (12 cm)       Sounds:   zeeeeee-yip (Wiki)       Identifying Characteristics:   Grey head/back with large greenish-yellow patch on back, white wingbars, yellow belly, white around eye       Similar to/Compare with:   Tropical Parula lacks white around eye       Range:   NE America from S Canada downwards; winters in FL, Central America , W Indies       Habitat:   various woodlands/forests